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Q I SOAFFOLD. 7 N0. 264,577, Patented Sept. 19, 1882.

r I. I A BY Mm ATTORNEYS N. EE'IENS Pholo-U'lhcgmphcn Wathinglon ac.

UNITED STATES PATENT @FFIQE.

'enonon W. SMITH, or HARLANSBURG, PENNSYLYANlA, ASSIGNOR T HIMSELF ANDJOHN G. DEAN, OF SAME PLACE.

SCAFFOLD.

SPECIFICATION forming part of Letters Patent No. 264,577, datedSeptember 19, 1882. Application filed April 18, 1882. (N 0 model.)

To all whom it may concern:

Be it known that I, GEOR E WASHINGTON SMITH, of Harlansburg, in thecounty of Lawrence and State of Pennsylvania, have invented a new andImproved Scaffold, of which the following is a full, clear, and exactdescription. 1

This invention relates to. improvements in scaffolds; and it consists inthe'combination and arrangement of parts substantially as hereinaftermore fully set forth.

Reference is to be had to the accompanying drawings, forming part ofthis specification, in which similar letters of reference indicatecorresponding parts in both the figures.

Figure 1 is a perspective view of my invention, and Fig. 2 isatransverse verticalsection of the same.

A are posts, provided at their upper ends with V-shaped arms or bracesto, which support the posts against a wall, B. These arms or braces areprovided with keepers or frames ta which slide upon the upper portionsof the posts A, and are secured at any desired height thereon byset-screws a O are posts or bars, having near their lower ends links orkeepers c, which slide upon the posts A and serve to hold the posts 0thereto. The said links are provided withfriction-rollers c on theinnerside of the posts A, to cause them to slide easier upon said postsA. The posts 0 are also provided with pawls or levers c pivoted to saidposts by pins 0 and engaging with sockets d in the posts A, and beingprovided with cords c for raising and disengaging said pawls from saidsockets.

H are horizontal arms or bars secured tothe posts G and braced andsupported by braces h. The said arms H are provided with keepers 0,similar to those on the lower ends of the This shaft has ratchet,

The operation of myinvention is as follows:

To raise the scaffold the shaftE is revolved bymeans of the levers G,thus winding up the rope F, which, pass ng under the pulleys c raisestheposts 0 and platform D. As it is raised the pawls e and ratchet-wheels cprevent itfrom again descending until they are disengaged, and it isalso prevented from descending by the pawls or catches 0. When it isdesired to lower the platform the catch 0 is released by pulling thecord 0 and the pawls e are released. and the rope F allowed to unwindfrom the shaft E.

If it is desired to have one end of the platform higher than the other,it can be done either by adjusting one of the V-shaped arms raisedhigherat one end than the other, or it may be kept perfectly level.

Third, it is easier to raise than the scaffolds formerly in use.

Fourth, the posts are inclined from a vertical line toward the wallabout half an inch to the foot, and the scaffold is thus prevented fromfalling outward.

Fifth, the apparatus may be used for various purposes.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent- In a scaffold, the combination, with theupright or slightly-inclined posts A, having adj ustable forked bracesa, provided withhooks a or means 'of attachment for the platformhoistingropes thereto, of the platform I), the sliding uprights 0,11aviug thehorizontal bars H fitted to move upon the posts A, the handled shaft ordrum E, having passed through it the platform-hoisting rope F, passingin contact with pulleys a, hung upon the up rights 0, said rope havingits ends secured to the hooks a of the braces a, the levers c pivoted tothe sliding uprights O and hearing in sockets in the posts A, and cords0, connect- 10 ed to the outer ends of said lever and passed over theplatform 1), substantially as set forth.

GEORGE WASHINGTON SMITH. \Vitnesses:

ALEX. RICHARDSON, JOHN PARKER.

